}));
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testComputeIfAbsent_nullTreatedAsAbsent() {
    initMapWithNullValue();
    assertEquals(
        "computeIfAbsent(presentAssignedToNull, function) should return newValue",
        getValueForNullKey(),
        getMap()
            .computeIfAbsent(

                }));
    expectAdded(e3());
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testMappedToNull() {
    initMapWithNullValue();
    assertEquals(
        "Map.merge(keyMappedToNull, value, function) should return value",
        v3(),
        getMap()
            .merge(
                getKeyForNullValue(),
                v3(),

    array[nullValueLocation] = entry(oldEntry.getKey(), null);
    return array;
  }

  protected void initMapWithNullKey() {
    resetMap(createArrayWithNullKey());
  }

  protected void initMapWithNullValue() {
    resetMap(createArrayWithNullValue());
  }

  /**
   * Equivalent to {@link #expectMissingKeys(Object[]) expectMissingKeys} {@code (null)} except that

    assertEqualIgnoringOrder(expectedEntries, entries);
  }

  @MapFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testForEach_nullValues() {
    initMapWithNullValue();
    List<Entry<K, V>> expectedEntries = asList(createArrayWithNullValue());
    List<Entry<K, V>> entries = new ArrayList<>();
    getMap().forEach((k, v) -> entries.add(entry(k, v)));

  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
  @MapFeature.Require(ALLOWS_NULL_VALUES)
  public void testToStringWithNullValue() {
    initMapWithNullValue();
    testToString_formatting();
  }

  @CollectionFeature.Require(absent = NON_STANDARD_TOSTRING)
  public void testToString_formatting() {
    assertEquals(

    Helpers.assertEqualIgnoringOrder(expectedEntries, entries);
  }

  @MapFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testForEach_nullValues() {
    initMapWithNullValue();
    List<Entry<K, V>> expectedEntries = asList(createArrayWithNullValue());
    List<Entry<K, V>> entries = new ArrayList<>();
    getMap().forEach((k, v) -> entries.add(entry(k, v)));

    assertEquals(1, getMap().size());
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(ONE)
  public void testForcePutNullValuePresent() {
    initMapWithNullValue();

    getMap().forcePut(k1(), null);

    expectContents(mapEntry(k1(), (V) null));

    assertFalse(getMap().containsKey(k0()));

    assertTrue(getMap().containsKey(k1()));

        getMap().getOrDefault(null, v3()));
  }

  @MapFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testGetOrDefault_presentMappedToNull() {
    initMapWithNullValue();
    assertNull(
        "getOrDefault(mappedToNull, default) should return null",
        getMap().getOrDefault(getKeyForNullValue(), v3()));
  }

  public void testGet_wrongType() {
    try {

    expectMissing(e0());
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testComputeIfPresent_nullTreatedAsAbsent() {
    initMapWithNullValue();
    assertNull(
        "computeIfPresent(presentAssignedToNull, function) should return null",
        getMap()
            .computeIfPresent(
                getKeyForNullValue(),

  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require(ALLOWS_NULL_VALUES)
  public void testContainsEntryWithNullValuePresent() {
    initMapWithNullValue();
    assertTrue(getMap().entrySet().contains(mapEntry(getKeyForNullValue(), null)));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testSetValue() {